got 4 white dwarfs germinated them then potted in soil 4" pot.... planning on tranferring to clay pebbles in a wilma 4 pot, flood n drain system. actually realised i got 2 questions for now..... 1, is it ok to go from soil to pebbles? and 2, how old/tall or whatever should they be? they been potted 5 days. all standing straight only an ich tall at tops tho please help a first timer